Vertical sorting in intense transport of bimodal contact load: measured distributions in collisional layer and effects on bed friction and flow condition
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F25%3A00385643" target="_blank" >RIV/68407700:21110/25:00385643 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.64697/978-90-835589-7-4_41WC-P1990-cd" target="_blank" >http://dx.doi.org/10.64697/978-90-835589-7-4_41WC-P1990-cd</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.64697/978-90-835589-7-4_41WC-P1990-cd" target="_blank" >10.64697/978-90-835589-7-4_41WC-P1990-cd</a>
Alternative languages
Result language
angličtina
Original language name
Vertical sorting in intense transport of bimodal contact load: measured distributions in collisional layer and effects on bed friction and flow condition
Original language description
In the intense transport of bimodal contact load under high bed shear conditions, particles of the two fractions, which differ in size, tend to separate. The finer particles form an interfacial layer at the top of the mobile bed, while the coarser particles predominantly occupy the collisional layer above the interface. We report on tilting-flume experiments focusing on measurements of the local velocity and concentration distributions of particles for each fraction within the collisional layer. The results reveal that, due to vertical sorting, the presence of finer fraction particles rapidly diminishes with increasing elevation above the interfacial layer, whereas the local concentration of the coarser fraction is higher within the collisional layer and reaches a maximum near the center of the layer. The local velocity of the sediment is lower than the local velocity of water at the same elevations, indicating the expected local slip between the phases within the collisional layer. Furthermore, we utilize the measured integral quantities along with a previously collected dataset to compare similar flows with unimodal and bimodal transport. The comparison indicates that bimodal transport offers advantages in terms of reduced channel resistance and enhanced transport capacity.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20101 - Civil engineering
Result continuities
Project
<a href="/en/project/GA23-07772S" target="_blank" >GA23-07772S: Structure and dynamics of multi-species bed load transport above erodible plane bed in open channel</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of the 41st IAHR World Congress
ISBN
978-90-835589-7-4
ISSN
2521-7119
e-ISSN
2521-7119
Number of pages
7
Pages from-to
671-677
Publisher name
IAHR - International Association for Hydro-Environment Engineering and Research
Place of publication
Madrid
Event location
Singapore
Event date
Jun 22, 2025
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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